High-purity corundum powder and preparation method thereof
A technology of corundum and powder, which is applied in the field of high-purity corundum powder and its preparation, which can solve the problems that impurities cannot be removed, impurity cannot be removed, and the time for dissolving impurities is long, so as to achieve low cost, good impurity removal effect and short production cycle.
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Embodiment 1
[0028] A high-purity corundum powder and a preparation method thereof. The steps of the technical solution adopted in this embodiment are:
[0029] Step 1: Crushing the corundum block material to a particle size of <50mm, sieving and classifying, to obtain fine crushed material with a particle size of <30mm and a corundum block ball with a particle size of ≥30mm and <50mm.
[0030] Step 2, crushing the finely divided material to a particle size of <8 mm, sieving and classifying, to obtain a primary fine powder with a particle size of <0.09 mm and a granular material I with a particle size of ≥0.09 mm and <8 mm.
[0031] Step 3: Perform magnetic separation for iron removal of the granular material I, and then crush the iron-removed granular material I to a particle size of <3 mm, sieve and classify, and obtain secondary fine powder with a particle size of <0.09 mm and a particle size of ≥ 0.09mm and <3mm pellets II.
[0032] Step 4. Perform magnetic separation on the granules...
Embodiment 2
[0042] A high-purity corundum powder and a preparation method thereof. Except the following situation, all the other are the same as embodiment 1:
[0043] The corundum is white corundum;
[0044] The crushing is pair-roll crushing;
[0045] The classification described in step 4 is hydraulic classification.
Embodiment 3
[0047] A high-purity corundum powder and a preparation method thereof. Except the following situation, all the other are the same as embodiment 1:
[0048] Described corundum is a kind of in plate corundum, sub-white corundum, bauxite corundum and brown corundum;
[0049] The crushing is rolling crushing;
[0050] The classification described in step 4 is wind classification.
[0051] Compared with the prior art, this specific embodiment has the following positive effects:
[0052] 1. In this specific embodiment, it is found through experiments that after the same batch of corundum blocks is broken and ground, the impurities are concentrated in the fine powder, and the fine powder with higher impurity content is directly removed. The impurity effect is good, and the purity of the prepared high-purity corundum powder is greater than 99.8%.
[0053] 2. In this specific embodiment, the homogeneous corundum ball is used as the grinding medium, new impurities will not be introd...
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